find the principal unit normal vector to the curve at the specific value of the parameter.
i need to use this formula
so, to find r'(t)
so, now to find the magnitude: simplified
puting them together
From here is where i get lost
I need to find T'(t)
I can seem to follow the solutions manual. I think they are using the quiotient rule due to the denominator having the 3/2
fraction. But if they are i still cant see how they are doing it.
Can anyone help me work out the next step for T'(t)?
Thank you so much!!!